RHEL 8 : gnutls (RHSA-2019:3600)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2019:3600. The text 
# itself is copyright (C) Red Hat, Inc.
#

include('compat.inc');

if (description)
{
  script_id(130558);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/15");

  script_cve_id("CVE-2019-3829", "CVE-2019-3836");
  script_xref(name:"RHSA", value:"2019:3600");

  script_name(english:"RHEL 8 : gnutls (RHSA-2019:3600)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"An update for gnutls is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security
impact of Moderate. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.

The gnutls packages provide the GNU Transport Layer Security (GnuTLS)
library, which implements cryptographic algorithms and protocols such
as SSL, TLS, and DTLS.

The following packages have been upgraded to a later upstream version:
gnutls (3.6.8). (BZ#1689967)

Security Fix(es) :

* gnutls: use-after-free/double-free in certificate verification
(CVE-2019-3829)

* gnutls: invalid pointer access upon receiving async handshake
messages (CVE-2019-3836)

For more details about the security issue(s), including the impact, a
CVSS score, acknowledgments, and other related information, refer to
the CVE page(s) listed in the References section.

Additional Changes :

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 8.1 Release Notes linked from the References section.");
  # https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?774148ae");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2019:3600");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2019-3829");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2019-3836");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-3836");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/11/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/11/06");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gnutls");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gnutls-c++");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gnutls-c++-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gnutls-dane");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gnutls-dane-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gnutls-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gnutls-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gnutls-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gnutls-utils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gnutls-utils-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:8");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Red Hat Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2019-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! preg(pattern:"^8([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 8.x", "Red Hat " + os_ver);

if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2019:3600";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : yum_report 
    );
    exit(0);
  }
  else
  {
    audit_message = "affected by Red Hat security advisory " + rhsa;
    audit(AUDIT_OS_NOT, audit_message);
  }
}
else
{
  flag = 0;
  if (rpm_check(release:"RHEL8", cpu:"i686", reference:"gnutls-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"s390x", reference:"gnutls-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"x86_64", reference:"gnutls-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"i686", reference:"gnutls-c++-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"s390x", reference:"gnutls-c++-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"x86_64", reference:"gnutls-c++-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"i686", reference:"gnutls-c++-debuginfo-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"s390x", reference:"gnutls-c++-debuginfo-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"x86_64", reference:"gnutls-c++-debuginfo-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"i686", reference:"gnutls-dane-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"s390x", reference:"gnutls-dane-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"x86_64", reference:"gnutls-dane-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"i686", reference:"gnutls-dane-debuginfo-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"s390x", reference:"gnutls-dane-debuginfo-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"x86_64", reference:"gnutls-dane-debuginfo-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"i686", reference:"gnutls-debuginfo-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"s390x", reference:"gnutls-debuginfo-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"x86_64", reference:"gnutls-debuginfo-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"i686", reference:"gnutls-debugsource-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"s390x", reference:"gnutls-debugsource-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"x86_64", reference:"gnutls-debugsource-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"i686", reference:"gnutls-devel-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"s390x", reference:"gnutls-devel-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"x86_64", reference:"gnutls-devel-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"s390x", reference:"gnutls-utils-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"x86_64", reference:"gnutls-utils-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"i686", reference:"gnutls-utils-debuginfo-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"s390x", reference:"gnutls-utils-debuginfo-3.6.8-8.el8")) flag++;
  if (rpm_check(release:"RHEL8", cpu:"x86_64", reference:"gnutls-utils-debuginfo-3.6.8-8.el8")) flag++;

  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get() + redhat_report_package_caveat()
    );
    exit(0);
  }
  else
  {
    tested = pkg_tests_get();
    if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
    else audit(AUDIT_PACKAGE_NOT_INSTALLED, "gnutls / gnutls-c++ / gnutls-c++-debuginfo / gnutls-dane / etc");
  }
}